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#include <reg52.H>
sbit SPEAKER = P3^7;
#define KEY P1
unsigned char MUSIC;
unsigned char STH0;
unsigned char STL0;
unsigned int code tab[]={
64021,64103,64260,64400,//低音3開始
64524,64580,64684,64777,
64820,64898,64968,65030,
65058,65110,65157,65178
};
void main(void){
TMOD=0x01;
ET0=1;
EA=1;
KEY = 0xff;
while(1){
if(KEY != 0xff){
switch (~KEY){//顯示的列位置
case 0x01://
MUSIC = 7;
break;//
case 0x02://
MUSIC = 6;
break;//
case 0x04://
MUSIC = 5;
break;//
case 0x08://
MUSIC = 4;
break;//
case 0x10://
MUSIC = 3;
break;//
case 0x20://
MUSIC = 2;
break;//
case 0x40://
MUSIC = 1;
break;//
case 0x80://
MUSIC = 0;
break;//
}
STH0=tab[MUSIC]/256;
STL0=tab[MUSIC]%256;
TR0=1;
}else{
SPEAKER = 1;
TR0=0;
}
}
}
void t0(void) interrupt 1 using 0{
TH0=STH0;
TL0=STL0;
SPEAKER=~SPEAKER;
}
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